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Bezaldehyde와 Semicarbazide의 縮合에 미치는 pH値의 影響

The Effect of pH on the Condensation Reaction of Bezaldehyde and Semicarbazide

약학회지 1962년 6권 1호 p.5 ~ 7
이길상, 김인자,
소속 상세정보
이길상 (  ) - Yonsei University College of Science and Engineering
김인자 (  ) - Yonsei University College of Science and Engineering

Abstract


Like the condensation reaction of general aldehyde, that of benzatdehyde with semicarbazide also depends upon the concentration of cartonium ion that is produced by hydrogen ion. The lower pH value is the facility of the formation of carbonium ion in the condensation reaction, while the reactivity of semicarbazide as a reactant is reduced. In this paper, therefore we want to find out the optirnvm pH value in the condensation reaction of benzaldehyde with semicarbazide. This optimum pH value was determined by using the simple paper-chromatographic method. Accoiding to the result of this experiment, the condensation reaction between benzaldehyde and semicarbazide reacts with its highest point at 3.5 pH value. It seems clear that at this point the benzaldehyde acquires the most suitatle amount of carbonium ion for the condensation reaction with semicarbazide, and the semicarbazide also has the optimum reactivity.
(Received December 2. 1961)

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